Tuesday, April 16
- Pennsylvania Avenue outside the White House is still closed to pedestrian traffic.
- Also in D.C., trash cans near Capitol buildings have been overturned and emptied.
- Emerson College and UMass Boston are among the Boston schools closed today.
- Security has been bolstered for Margaret Thatcher's Wednesday funeral.
Monday, April 15
- Mayor Bloomberg told reporters that New York City's "counter-terrorism infrastructure" was being "fully mobilized," including 1,000 members of the NYPD prepared for counter-terrorism duties.
- Cell phone service has been shut down in the Boston area to prevent any remote detonations, according to the Associated Press. Updated 6:09pm: The AP has retracted its first report that cell phone service was shut down and is now reporting that service was erratic because of high traffic.
- Secret Service shut down Pennsylvania Avenue outside the White House, cordoning off the area with yellow police tape, according to CBS.
- The FAA has declared a ground stop for Boston's Logan Airport until further notice.
- Tufts Medical Center was evacuated with family members and visitors ordered to leave, but not patients.
- In Boston, the MBTA Green Line isn't running between Kenmore and Park Street Stations. Update, 5:47pm: Service has resumed with delays.
- NYPD cars are have descended on Times Square.
- Police are asking everyone in Boston to stay home.
- Los Angeles Metro security is on a heightened state of alert, though normal bus and rail service continues.
- MTA security has been beefed up, with bag checks instituted.
- Security checks installed at Boston's North Station.
- Heavily-armed guards on patrol at Mass General Hospital.
- The official Boston Marathon Twitter actually had to announce that the Post-Race Party has been cancelled. Uh, thanks?
[AP Photo by Charles Krupa]